Granted Patent
Utility
US 4,566,770 · App. 06/675,651
Mount for transparency film frame
Inventors:
Frank M. Czumak, Joseph H. Wright
Patented Case
View Patent ↗
Granted: Jan 28, 1986
Filed: Nov 28, 1984
Inventors
Frank M. Czumak
Joseph H. Wright
Assignee (at issue)
Polaroid Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.